Her finding it cute, not that he's aware of it, is not helping.

"I'm not used to being around a lot of people, and I grew up kind of sheltered. My world isn't exactly safe." Yes focus on that Trunks, that's easier. "It's complicated, but the short version is this. My whole life, my world has been under threat and terror from homicidal androids who don't care about anything but their own amusement. Pretty much anyone who could stand up to them has died, except me. I'm alive because I amuse them."